Diploma and Master Thesis

Measurement of the ZDDP tribofilm thickness using optical interferometer and atomic force microscope

Diamond-like carbon (DLC) coatings are very promising material for the use in many applications, in particular those operating under the most demanding boundary lubrication conditions, including automotive, where low friction and durability are of extreme importance. In order to introduce DLCs to automotive application, it is necessary that DLC coatings are “synchronized” with conventional automotive lubricants where zinc dithiophosphates (ZDDPs) are key additives.

Numerous studies have been already focused on interactions between various DLCs and lubricants containing ZDDPs, however, the understanding of ZDDP-based lubrication of DLC is still far from understood.

Within the scope of this work the emphasis will be on the investigation of various cleaning procedures (ultrasonication, rinsing,..) on the existence of  ZDDP tribofilm on various DLC coatings, after tribological tests performed under boundary lubrication conditions. After application of cleaning procedures the surface will be investigated using different nano-technological tools, such as optical interferometer, atomic force microscope, scanning electron microscope and infrared spectrometer.

Contact person: Prof. PhD. Mitjan Kalin

Webpage of the laboratory: https://www.tint.fs.uni-lj.si/

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